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2494873
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Patent number 2,494,873
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Issue date Jan 17, 1950
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2423107
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Patent number 2,423,107
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Issue date Jul 1, 1947
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2380766
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Patent number 2,380,766
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Issue date Jul 31, 1945
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2287164
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Patent number 2,287,164
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Issue date Jun 23, 1942
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2263389
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Patent number 2,263,389
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Issue date Nov 18, 1941
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2213384
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Patent number 2,213,384
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Issue date Sep 3, 1940
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER